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时间: 2003-2-14 16:24

作者: spark7 标题: 试

1. In followed chart, which part could be omitted during the location update procedure?

   Mobile Station                   Network
┌─                                           ─┐
│       CHANNEL REQUEST                   │ RR connection
│ --------------------------------------->  │ establishment
│                                           │ (MO)
│                                           │
│       IMMEDIATE ASSIGNMENT                │
│ <-------------------------------------- │
└─                                           ─┘

┌─                                           ─┐
│                                           │
│       LOCATION UPDATING REQUEST          │
│ ----------------------------------------> │ Service request
│                                           │
│                                           │
│                                           │
│                                           │
└─                                           ─┘
┌─                                           ─┐
│       AUTHENTICATION REQUEST             │
│ <---------------------------------------  │ Authentication
│                                           │
│       AUTHENTICATION RESPONSE             │
│ ----------------------------------------> │
└─                                           ─┘
┌─                                           ─┐
│                                           │
│       CIPHER MODE COMMAND                │
│ <---------------------------------------  │ Ciphering mode
│                                           │  setting
│       CIPHER MODE COMPLETE                │
│ ----------------------------------------->│
└─                                           ─┘
┌─                                           ─┐
│       LOCATION UPDATING ACCEPT          │
│ <---------------------------------------  │
│                                           │ Service accepted
│       TMSI REALLOCATION COMPLETE          │
│ --------------------------------------->  │
└─                                           ─┘
┌─                                           ─┐
│       CHANNEL RELEASE                   │  RR connection
│ <---------------------------------------  │  release
│                                           │
└─                                           ─┘

2. Tell me one kind of technical realization of Prepaid service in GSM network? Any element is necessary to be added in the core GSM network? More detail is preferred.
3. In Europe the maximum character size of one SMS is 160, Could you please tell me what is the maximum size for Chinese character in one SMS? Tell me why?

时间: 2003-2-18 20:44

作者: 皮皮哥

什么哟

时间: 2003-2-18 22:04

作者: sr71

1.Authentication and Ciphering mode could be skipped when roaming within an visitor location registers area (without need to update HLR).

2.The prepaid service could be "神州行" or "如意通"
The new nodes include:
GSM Service Control Function (gsmSCF)
The functional entity that contains the CAMEL service logic to implement Operator Specific Service.
GSM Service Switching Function (gsmSSF)
Interfaces the MSC/GMSC to the gsmSCF.It's derived from the IN SSF, but uses different triggering mechanisms because of the nature of the mobile network.
GSM Specialised Resource Function (gsmSRF)
Only exists in CAMEL 2.

3.It consists of 70 octets in Chinese as the SMS is coded using the GSM 7 bit default alphabet in Europe,and the exact length could be variable according to the different character set.

[此贴子已经被作者于2003-2-18 22:04:27编辑过]

时间: 2003-2-18 22:34

作者: sr71

4.GPRS Network operation mode have:
Network operation mode I: the network sends a CS paging message for a GPRS-attached MS, either on the same channel as the GPRS paging channel ,or on a
GPRS traffic channel.
Network operation mode II: the network sends a CS paging message for a GPRS-attached MS on the CCCH paging channel, and this channel is also used for GPRS paging.
Network operation mode III: the network sends a CS paging message for a GPRS-attached MS on the CCCH paging channel, and sends a GPRS paging message on either the packet paging channel or on the CCCH paging channel.

The mobile phone class indicates the mobile phone capabilities.
Class A mobile phones can be connected to both GPRS and GSM services simultaneously.
Class B mobile phones can be attached to both GPRS and GSM services, using one service at a time. Class B enables making or receiving a voice call, or sending/receiving an SMS during a GPRS connection. During voice calls or SMS, GPRS services are suspended and then resumed automatically after the call or SMS session has ended.
Class C mobile phones are attached to either GPRS or GSM voice service. You need to switch manually between services.

5.MSISDN is implemented with the E.164 standard,while IMSI uses the E.212.

[此贴子已经被作者于2003-2-18 22:34:07编辑过]

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